I tested in preview (using Node-Webkit) and the exported game, and the game didn't freeze in both...
On exported, I played until I died 3 times and the game was running smoothly...
My PC configuration:
- OS: Windows 8 x64
- Processor: Intel Core i7-3770 3.4GHz
- RAM: 8 gb
- Video: AMD Radeon HD 7450
I couldn't see your code, I don't have chinese/japanese installed on my PC, sorry... ¬¬"